The multistage amplifier circuit of Figure Q.2(b) have the following parameters: Q 1 and Q 2 : β = 200, V BE = 0.7 V, VT = 26 mV , V A = ∞ Given that I CQ1 = 2 mA and V CEQ1 = 2 V. (i) Determine the...

The multistage amplifier circuit of Figure Q.2(b) have the following parameters:
Q₁
and Q₂
: β = 200, V_BE
= 0.7 V, VT = 26 mV , V_A
= ∞
Given that I_CQ1
= 2 mA and V_CEQ1
= 2 V.

(i) Determine the value for R_B4. List the assumption/approximation made in the analysis.


(ii) Sketch and label the small-signal hybrid-π equivalent circuit at midband
frequency range.


(iii) Calculate the small signal hybrid-π model parameters: g_m
and r_π
for Q₁
and Q₂. Then, determine Z_i2
and Z_o.

Extracted text: +15 V Rc 3.3 k2 Ra 10 k2 100 k2 HE C4 Rs RL Va 10k2 100 2 Ruz 50 k2 RB4 RE 2 k2 Z, Figure Q.2(b)